Graco 15D126 U‑Cup Seal (0.156″ Shaft)
The Graco 15D126 U‑Cup Seal is a high-precision sealing component engineered for shafts with a 0.156″ diameter, commonly found in Graco texture spray guns. Its rugged design helps maintain leak‑free performance even during repeated trigger action.
Key Features
- U‑cup profile provides effective dynamic sealing under motion
- Specifically sized for 0.156″ (3.96 mm) shafts
- Made from durable elastomer material that resists wear
- OEM-grade replacement ensures precise compatibility
- Reduces fluid bypass and ensures consistent spray performance
Technical Specifications
| Part Number | 15D126 |
| Seal Type | U‑Cup |
| Shaft Diameter | 0.156″ (3.96 mm) |
| Material | Wear‑resistant elastomer |
| Application | Reciprocating or rotating shafts in Graco texture guns |
Durability & Performance
The U‑cup geometry creates a strong sealing lip that stays in contact with the shaft even when the gun is actuated repeatedly. This helps prevent leakage, backflow, and pressure loss, making it ideal for high-frequency or high-pressure applications.
Applications & Compatibility
This seal is specifically referenced in Graco parts documentation for certain TexSpray / texture guns, particularly models using the 0.156″ diameter fluid‑needle shaft.
- Graco TexSpray / texture gun model 248091 (non‑bleeder)
- Graco TexSpray / texture gun model 248093 / 248094 (bleeder-style) parts list includes 15D126
Installation & Maintenance
- Thoroughly clean the shaft before installing the seal.
- Lubricate the lip with a compatible grease or fluid to avoid initial wear.
- Ensure the U‑cup’s sealing lip faces the pressure side for correct orientation.
- Check periodically for lip wear or deformation; replace if leakage begins.
- Use non-metal tools for installation to avoid damaging the seal material.
Frequently Asked Questions
The U‑cup profile offers dynamic sealing under motion—it maintains tight contact with the shaft during reciprocation or rotation, reducing leaks and maintaining pressure.
The 15D126 seal is listed in Graco TexSpray / texture gun parts diagrams for models such as 248091 (non‑bleeder) and 248093 / 248094 (bleeder), which use a 0.156″ fluid shaft.
Check the seal during regular maintenance cycles. If you see leakage, lip deformation, or reduced spray performance, it's time to replace the seal to maintain reliable operation.
